日前,由第四(si)軍(jun)醫大學西京醫院整形外科中(zhong)心和(he)濟南軍(jun)區總醫院整形外科共同完成的(de)一(yi)項研究證(zheng)明,地塞米松保護皮(pi)瓣與其減少中(zhong)性粒(li)細(xi)胞壞死數量,增加(jia)其凋亡水平有關。
島狀皮瓣(ban)是修(xiu)復皮膚組(zu)織(zhi)(zhi)缺損(sun)的(de)(de)重要手段,但臨床上(shang)常(chang)出現缺血-再(zai)灌(guan)注(zhu)損(sun)傷。近十幾年來(lai),對(dui)皮瓣(ban)缺血-再(zai)灌(guan)注(zhu)損(sun)傷的(de)(de)研究取得了不少進展(zhan),特(te)別是中性粒(li)細胞(bao)粘附、浸潤對(dui)組(zu)織(zhi)(zhi)的(de)(de)損(sun)害(hai)引起了學者們的(de)(de)廣泛重視。但中性粒(li)細胞(bao)凋亡(wang)與壞死在皮瓣(ban)缺血-再(zai)灌(guan)注(zhu)損(sun)傷過程中的(de)(de)作用并未(wei)得到深入研究。
為研究島狀皮瓣缺血(xue)-再灌(guan)注(zhu)損(sun)傷后組織學(xue),闡明中性粒細胞在這一過程中的作(zuo)(zuo)用及地塞(sai)米(mi)松的保(bao)護作(zuo)(zuo)用。研究人(ren)員將48只(zhi)wistar大鼠等分為地塞(sai)米(mi)松治療組與生理鹽水對照組,觀察組織學(xue)改變。
結果顯(xian)示,治療組(zu)皮(pi)瓣成活(huo)面積明(ming)(ming)顯(xian)增加(jia)。光鏡(jing)(jing)顯(xian)示皮(pi)瓣組(zu)織學改變(bian)輕(qing);透射電鏡(jing)(jing)發現(xian)中(zhong)(zhong)性(xing)粒細(xi)(xi)(xi)胞(bao)(bao)壞死(si)(si)數量較少,凋亡(wang)數量較多(duo),皮(pi)瓣毛(mao)細(xi)(xi)(xi)血管(guan)(guan)(guan)(guan)結構較完整(zheng);掃(sao)描(miao)電鏡(jing)(jing)顯(xian)示血管(guan)(guan)(guan)(guan)通暢,中(zhong)(zhong)性(xing)粒細(xi)(xi)(xi)胞(bao)(bao)活(huo)化程度輕(qing),與血管(guan)(guan)(guan)(guan)壁粘(zhan)附現(xian)象少見(jian)。對照組(zu)皮(pi)瓣組(zu)織學改變(bian)重(zhong);光鏡(jing)(jing)顯(xian)示術后1天即可見(jian)皮(pi)瓣內(nei)血管(guan)(guan)(guan)(guan)有(you)(you)大量血栓形成,皮(pi)瓣中(zhong)(zhong)性(xing)粒細(xi)(xi)(xi)胞(bao)(bao)浸潤數量多(duo);透射電鏡(jing)(jing)顯(xian)示皮(pi)瓣毛(mao)細(xi)(xi)(xi)血管(guan)(guan)(guan)(guan)結構不完整(zheng),內(nei)皮(pi)細(xi)(xi)(xi)胞(bao)(bao)壞死(si)(si)、脫(tuo)落,皮(pi)瓣中(zhong)(zhong)有(you)(you)較多(duo)數量的(de)壞死(si)(si)中(zhong)(zhong)性(xing)粒細(xi)(xi)(xi)胞(bao)(bao),少見(jian)凋亡(wang)的(de)中(zhong)(zhong)性(xing)粒細(xi)(xi)(xi)胞(bao)(bao),3天時(shi)中(zhong)(zhong)性(xing)粒細(xi)(xi)(xi)胞(bao)(bao)數量明(ming)(ming)顯(xian)減少,但皮(pi)瓣中(zhong)(zhong)有(you)(you)大量溶酶體分布(bu);掃(sao)描(miao)電鏡(jing)(jing)顯(xian)示血管(guan)(guan)(guan)(guan)附壁血栓形成多(duo),血管(guan)(guan)(guan)(guan)內(nei)中(zhong)(zhong)性(xing)粒細(xi)(xi)(xi)胞(bao)(bao)活(huo)化程度重(zhong),與血管(guan)(guan)(guan)(guan)壁粘(zhan)附現(xian)象多(duo)見(jian)。
據研究人(ren)員介紹(shao),壞(huai)死(si)與凋亡是細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)死(si)亡的(de)(de)兩(liang)種方(fang)式。壞(huai)死(si)是細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)的(de)(de)被動死(si)亡,而凋亡則是細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)的(de)(de)主(zhu)動死(si)亡。中(zhong)(zhong)性(xing)粒(li)(li)(li)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)壞(huai)死(si)后(hou)必(bi)然(ran)要釋放(fang)大量的(de)(de)溶酶體等并導致組織(zhi)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)損(sun)(sun)(sun)害,而凋亡細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)則可被吞(tun)噬細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)吞(tun)噬以(yi)減輕(qing)組織(zhi)損(sun)(sun)(sun)害。透(tou)射(she)電鏡(jing)上(shang)也(ye)(ye)可見到再(zai)(zai)灌(guan)(guan)注損(sun)(sun)(sun)傷3天對照組皮(pi)(pi)(pi)瓣(ban)(ban)內有(you)大量的(de)(de)溶酶體。從(cong)掃描電鏡(jing)與透(tou)射(she)電鏡(jing)聯(lian)合分析可看出,伴隨著皮(pi)(pi)(pi)瓣(ban)(ban)的(de)(de)缺(que)血(xue)-再(zai)(zai)灌(guan)(guan)注損(sun)(sun)(sun)傷,中(zhong)(zhong)性(xing)粒(li)(li)(li)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)活化(hua)后(hou)粘(zhan)附到血(xue)管內皮(pi)(pi)(pi)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)上(shang),進而穿(chuan)透(tou)到皮(pi)(pi)(pi)瓣(ban)(ban)組織(zhi),經歷(li)了(le)(le)復雜的(de)(de)變(bian)化(hua),最(zui)終壞(huai)死(si)釋放(fang)大量溶酶體等物質毒害皮(pi)(pi)(pi)瓣(ban)(ban)組織(zhi)。中(zhong)(zhong)性(xing)粒(li)(li)(li)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)既然(ran)經歷(li)了(le)(le)如此復雜的(de)(de)變(bian)化(hua),單純采取抗自由基、抗白細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)粘(zhan)附或擴張血(xue)管在臨床(chuang)上(shang)防治缺(que)血(xue)-再(zai)(zai)灌(guan)(guan)注不能取得理想效果也(ye)(ye)就不足為奇了(le)(le)。采用地塞米(mi)松則可減輕(qing)中(zhong)(zhong)性(xing)粒(li)(li)(li)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)活化(hua)程(cheng)度,減少(shao)其與血(xue)管內皮(pi)(pi)(pi)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)粘(zhan)附數(shu)量,保護血(xue)管結構(gou)完整(zheng)。也(ye)(ye)可減輕(qing)中(zhong)(zhong)性(xing)粒(li)(li)(li)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)壞(huai)死(si)數(shu)量,調理中(zhong)(zhong)性(xing)粒(li)(li)(li)細(xi)(xi)(xi)(xi)胞(bao)(bao)(bao)(bao)(bao)(bao)凋亡水平,從(cong)而減輕(qing)皮(pi)(pi)(pi)瓣(ban)(ban)損(sun)(sun)(sun)害,防治了(le)(le)缺(que)血(xue)-再(zai)(zai)灌(guan)(guan)注損(sun)(sun)(sun)傷。
是這樣的。
都是激素類藥物,但他們的機理還是不一樣的。強的松的副作用要大于地塞米松的副作用,強的松的作用較地塞米松更持久。但是,1mg的地塞米松相當于7.5mg的強的松。
所以,你在換藥治(zhi)療的時(shi)候(hou),要注意(yi)換算(suan)劑量。
本文地址://n85e38t.cn/zhongyizatan/78178.html.
聲明: 我(wo)(wo)們致力于(yu)保護作(zuo)者版(ban)權(quan),注(zhu)重(zhong)分享,被刊用文章因無(wu)法(fa)核實真實出處,未(wei)能(neng)及(ji)時(shi)與作(zuo)者取得聯系,或(huo)有版(ban)權(quan)異(yi)議的,請聯系管(guan)理員,我(wo)(wo)們會(hui)立(li)即(ji)(ji)處理,本(ben)站部分文字與圖片資源來自于(yu)網(wang)絡,轉載是(shi)出于(yu)傳遞更多(duo)信息之目的,若(ruo)有來源標注(zhu)錯誤(wu)或(huo)侵(qin)犯了您的合法(fa)權(quan)益(yi),請立(li)即(ji)(ji)通知我(wo)(wo)們(管(guan)理員郵箱:),情況(kuang)屬實,我(wo)(wo)們會(hui)第(di)一時(shi)間予以(yi)刪除,并同時(shi)向您表示歉意,謝謝!
上(shang)一篇(pian): 克銀(yin)丸(wan)致(zhi)肝損害和剝(bo)脫性(xing)皮炎(yan)
下一篇: 葛根素可(ke)治老年VBI